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Vol 2: Racial Differences in the Prevalence and Outcomes of Atrial Fibrillation Among Patients Hospitalized With Heart Failure.This article is from Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, volume 2.AbstractBackground: The intersection of heart failure HF and atrial fibrillation AF is common, but the burden of AF among black patients with HF is poorly characterized. We sought to determine the prevalence of AF, characteristics, in‐hospital outcomes, and warfarin use associated with AF in patients hospitalized with HF as a function of race. Methods and Results: We analyzed data on 135 494 hospitalizations from January 2006 through January 2012 at 276 hospitals participating in the American Heart Associations Get With The Guidelines HF Program. Multivariable logistic regression models using generalized estimating equations approach for risk‐adjusted comparison of AF prevalence, in‐hospital outcomes, and warfarin use. In this HF population, 53 389 39.4% had AF. Black patients had markedly less AF than white patients 20.8% versus 44.8%, P